This paper presents a universal quantum processing platform for neutral atom optical clocks, combining high-fidelity quantum operations with ancilla-based readout. The system enables the generation of entangled probe states and high-precision measurements, crucial for quantum metrology. The researchers demonstrate high-fidelity entangling gates (99.62% fidelity) using Rydberg interactions and dynamical connectivity, enabling the creation of Bell pairs and cascades of Greenberger-Horne-Zeilinger (GHZ) states. They also implement dual-quadrature readout of GHZ states, achieving improved sensitivity and dynamic range. The system supports repeated, non-destructive measurements of clock qubits through ancilla-based quantum logic spectroscopy, enabling fast phase detection with minimal dead time between repetitions. This approach allows for multi-qubit parity checks and measurement-based Bell state preparation, essential for quantum error correction and enhanced metrology. The work demonstrates a scalable quantum processor that integrates quantum computing and sensing, paving the way for hybrid quantum devices with neutral atoms and quantum sensors. The results set a new state-of-the-art for entangling gate fidelities in long-lived states of neutral atoms and highlight the potential for practical applications in quantum-enhanced metrology and sensing.This paper presents a universal quantum processing platform for neutral atom optical clocks, combining high-fidelity quantum operations with ancilla-based readout. The system enables the generation of entangled probe states and high-precision measurements, crucial for quantum metrology. The researchers demonstrate high-fidelity entangling gates (99.62% fidelity) using Rydberg interactions and dynamical connectivity, enabling the creation of Bell pairs and cascades of Greenberger-Horne-Zeilinger (GHZ) states. They also implement dual-quadrature readout of GHZ states, achieving improved sensitivity and dynamic range. The system supports repeated, non-destructive measurements of clock qubits through ancilla-based quantum logic spectroscopy, enabling fast phase detection with minimal dead time between repetitions. This approach allows for multi-qubit parity checks and measurement-based Bell state preparation, essential for quantum error correction and enhanced metrology. The work demonstrates a scalable quantum processor that integrates quantum computing and sensing, paving the way for hybrid quantum devices with neutral atoms and quantum sensors. The results set a new state-of-the-art for entangling gate fidelities in long-lived states of neutral atoms and highlight the potential for practical applications in quantum-enhanced metrology and sensing.